Vee Ess And Co.

• Screwed Female Ends to BS:21 / IS : 554.
• Spring Loaded Piston Type design provided with high-quality Nitrile Rubber “O” ring to have less maintenance cost.
• Provision for pressure gauge is provided.
• Designed to suite precise applications requiring accurate pressure rating (pressure drop being less).
• Most ideal for Sensitive & a consistent fluid regulation.
• No external source of energy required.
• Very rugged type of construction leads to low damages and self-operating in nature.
• Can be installed at 360 Deg. Rotational Axis.
• Screwed Female Ends.
• Metal piston offers more life than conventional rubber diaphragm-type PRV.
• Compact Size, easy to install.
• Facility provided to install a pressure gauge of 1/4” BSP size to gauge the critically relevant outlet pressure.
• All ‘O’ rings are of superior food-grade material, hence ensuring absolute zero health hazard.

• Screwed Female BSP Parallel Threads.

• "LEADER" Gun Metal Pressure Reducing Valves are suitable for both above-ground & underground installations.
• Best suited for potable water, treated fresh water, wastewater, neutral liquids & some gases.

• Maximum Inlet Pressure: 20 Bar to 27 Bar.
• Outlet Pressure Range: 0.5 to 6 Bar(Max.).
• See Pressure/Temperature Diagram.

• Maximum working temperature: 100°C.
• See Pressure / Temperature Diagram.

• 27 Bar

• 0.5 to 6 Bar

INTRODUCTION

Leader forged steel check valve is to provide with single disc. With the force of medium, the disc will automatically open or close. When the media stops the flow, the disc will be closed under its own force. No manual intervention is involved in the whole process Check valve is mainly to prevent the media reverse flow and ensure one-way flow of media channels only. It prevents accidents while a sudden loss of power in the pipeline medium such as the power equipment like pump damages, and the medium reserve flow against power source.

• Design Std.: BSEN ISO 15761, ASME B16.34.
• Pressure Temperature Rating as per ASME B16.34, BSEN ISO 15761.
• Sturdy design for high-pressure & temperature service.
• Bolted body-cover design, Valves with welded cover also available on request.
• Bolted body-cover joints provided with spiral-wound stainless steel gasket and graphite filler for protection against leaks.
• Piston/Disc is guided in the Cover assuring accurate return to seating to achieve leak tightness.
• Spring-loaded disc on check valves suitable for non-horizontal applications too available on request.
• Minimum differential pressure of 1 bar required for operating the valve.
• Socket welded ends as per ASME B16.11.
• Screwed Female Taper ends as per ASME B1.20.1 (NPT)/BS 21 & Screwed Female Parallel ends as per ISO 228/BS 21 available on request.
• Socket-weld Class 800 Reduced Bore valves confirm to Class 3000 (or Sch.80/Sch. XS) fittings of ASME B16.11.
• Socket-weld Class 800 Full Bore valves confirm to Class 6000 (or Sch.160) fittings of ASME B16.11.
• Butt weld ends as per ASME B 16.25 available on request.
• Low-Temperature Carbon Steel & Austenitic SS forging for body and cover design qualified as per BS 6364 for Cryogenic service available on request.
• Valves can be offered to NACE MR-0175 and other special NACE requirements.
• Valves are available with IBR certification.
• Port Opening : Full Bore Product Description : Bolted Cover Trim : SS (ASTM 276 TYPE 410) Fastener : Alloy Steel (Gr B7/Gr 2H) Gasket : Sprial Wound SS 304 with Graphoil Filler End Details : Socket Welded Ends as per ASME B16.11 Test Pressure : B.T.P. - 384 Bar Hyd. : S.T.P. - 281 Bar Hyd.

• Screwed in cover, integral seat.
• Gun Metal / Brass working parts, integral seat.
• Metal to metal seating.
• Disc is guided in body as well in cover to resist vibration induced by high flow velocity.
• Flanged ends as per BS:10 Table ‘E’.
• Permit flow in one direction and closes automatically if the flow reverses.
• Suitable for only horizontal installation.
• Also available with Rubber / PTFE Seating for Air and Gas applications at an extra cost.

• Flanged ends as per BS:10 table ‘E’.
• Flange drilling as per other standards also available upon request at an extra cost.
• End Details : Flanges as per BS : 10 Table'E' FF (Undrilled)

• INTRODUCTION

  
  Leader forged steel check valve is to provide with single disc. With the force of medium, the disc will automatically open or close. When the media stops the flow, the disc will be closed under its own force. No manual intervention is involved in the whole process Check valve is mainly to prevent the media reverse flow and ensure a one-way flow of media channels only. It prevents accidents while a sudden loss of power in the pipeline medium such as the power equipment like pump damages, and the medium reserve flow against the power source.

• Design Std.: BSEN ISO 15761, ASME B16.34.
• Pressure Temperature Rating as per ASME B16.34, BSEN ISO 15761.
• Sturdy design for high-pressure & temperature service.
• Bolted body-cover design, Valves with welded cover also available on request.
• Bolted body-cover joints provided with spiral-wound stainless steel gasket and graphite filler for protection against leaks.
• Piston/Disc is guided in the Cover assuring accurate return to seating to achieve leak tightness.
• Spring-loaded disc on check valves suitable for non-horizontal applications too available on request.
• Minimum differential pressure of 1 bar required for operating the valve.
• Socket welded ends as per ASME B16.11.
• Screwed Female Taper ends as per ASME B1.20.1 (NPT)/BS 21 & Screwed Female Parallel ends as per ISO 228/BS 21 available on request.
• Socket-weld Class 800 Reduced Bore valves confirm to Class 3000 (or Sch.80/Sch. XS) fittings of ASME B16.11.
• Socket-weld Class 800 Full Bore valves confirm to Class 6000 (or Sch.160) fittings of ASME B16.11.
• Butt weld ends as per ASME B 16.25 available on request.
• Low-Temperature Carbon Steel & Austenitic SS forging for body and cover design qualified as per BS 6364 for Cryogenic service available on request.
• Valves can be offered to NACE MR-0175 and other special NACE requirements.
• Valves are available with IBR certification.
• Type of Seat : Renewable Type of Disc : Renewable Disc Trim : SS (ASTM 276 TYPE 410) Fastener : Alloy Steel (Gr B7/Gr 2H) Gasket : Sprial Wound SS 304 with Graphoil Filler End Details : Socket Welded Ends as Per ANSI B16.11 Test Pressure : B.T.P. - 207 Bar Hyd. : S.T.P. -152 Bar Hyd.

• Forged Steel Horizontal Lift Check Valve with Socket Weld / Screwed ends.

• Prevents backflow and ensures unidirectional flow.

• Strong forged steel body for high-pressure & high-temperature use.

• Widely used in steam, oil, gas, and process piping systems.

• Design Std.: BS 5154.
• Screwed in cover, Integral Seat.
• Resilient Rubber Disc.
• Screwed female BSP parallel threads to BS21 / IS:554.
• Permit flow in one direction and closes automatically if the flow reverses.
• Suitable for both horizontal & vertical installation.

• Screwed Female Parallel Threads to BS21 / IS:554.

• “LEADER” Brass Swing Check valves are suitable for above-ground installations.
• Best suited for hot & cold water.

• Screwed Female Ends to BS:21 / IS : 554.
• Spring Loaded Piston Type design provided with high-quality Nitrile Rubber “O” ring to have less maintenance cost.
• Provision for pressure gauge is provided.
• Designed to suite precise applications requiring accurate pressure rating (pressure drop being less).
• Most ideal for Sensitive & a consistent fluid regulation.
• No external source of energy required.
• Very rugged type of construction leads to low damages and self-operating in nature.
• Can be installed at 360 Deg. Rotational Axis.
• Screwed Female Ends.
• Metal piston offers more life than conventional rubber diaphragm-type PRV.
• Compact Size, easy to install.
• Facility provided to install a pressure gauge of 1/4” BSP size to gauge the critically relevant outlet pressure.
• All ‘O’ rings are of superior food-grade material, hence ensuring absolute zero health hazard.

• Screwed Female BSP Parallel Threads.

• "LEADER" Gun Metal Pressure Reducing Valves are suitable for both above-ground & underground installations.
• Best suited for potable water, treated fresh water, wastewater, neutral liquids & some gases.

• Maximum Inlet Pressure: 20 Bar to 27 Bar.
• Outlet Pressure Range: 0.5 to 6 Bar(Max.).
• See Pressure/Temperature Diagram.

• Maximum working temperature: 100°C.
• See Pressure / Temperature Diagram.

• 27 Bar

• 0.5 to 6 Bar

• Design Std.: BS 5154.
• Screwed in cover.
• Gun Metal / Brass working parts, integral seat.
• Metal to metal seating.
• Disc is guided in body as well in cover to resist vibration induced by high flow velocity.
• Screwed female BSP parallel threads to BS21 / IS:554.
• Permit flow in one direction and closes automatically if the flow reverses.
• Suitable for only horizontal installation.
• Also available with Rubber / PTFE Seating for Air and Gas applications at an extra cost.
• End Details : Screwed Female BSP Parallel Threads

INTRODUCTION

Leader forged steel check valve is to provide with single disc. With the force of medium, the disc will automatically open or close, When the media stops the flow, the disc will be closed under its own force. No manual intervention is involved in the whole process Check valve is mainly to prevent the media reverse flow and ensure one-way flow of media channels only. It prevents accidents while a sudden loss of power in the pipeline medium such as the power equipment like pump damages, and the medium reserve flow against power source.

Design Std.: ASME B16.34.

Pressure Temperature Rating as per ASME B16.34.

Sturdy design for high-pressure & temperature service.

Welded body-cover joints offers an additional level of safety against fugitive emission.

Piston / Disc is guided in the Cover assuring accurate return to seating to achieve leak tightness.

Spring-loaded disc on check valves suitable for non-horizontal applications too available on request.

Socket welded ends as per ASME B16.11.

Butt weld ends as per ASME B16.25 available on request.

Low-Temperature Carbon Steel & Austenitic SS forging for body and cover design qualified as per BS 6364 for Cryogenic service available on request.

Valves can be offered to NACE MR-0175 and other special NACE requirements.

Valves are available with IBR certification.

Pressure/Class Rating : Class - 2500 Body Material Cum Std. : FCS (A 105) Port Opening : Full Bore Product Description : Welded on Cover Trim : SS (ASTM 276 TYPE 410) : With Stellited Seats End Details : Socket Welded End as per ASME B16.11 Test Pressure : B.T.P. - 639 Bar Hyd. : S.T.P. - 468 Bar Hyd.

• Design Std.: BS 5154.
• Screwed in cover.
• Gun Metal / Brass working parts, integral seat.
• Metal to metal seating.
• Disc is guided in body as well in cover to resist vibration induced by high flow velocity.
• Screwed female BSP parallel threads to BS21 / IS:554.
• Permit flow in one direction and closes automatically if the flow reverses.
• Suitable for only horizontal installation.
• Also available with Rubber / PTFE Seating for Air and Gas applications.

• Screwed Female Parallel Threads to BS21 / IS:554.
• Taper Threads available only upon request.

SCREWED IN BONNET & INTEGRAL SEAT.
CONFORMING TO IS:778, Class 1.

SCREWED FEMALE ENDS(BSP) AS IS:554

SUITABLE FOR NON-SHOCK HYDRAULIC LINE TEMP. UP TO 45° C.

BODY TEST PRESSURE :-1.5 Mpa
SEAT TEST PRESSURE :-1.0 Mpa

INTRODUCTION
Leader Dual Plate Check Valves are automatic, quick-acting valve designed to prevent the reversal of flow in a piping system. The two valve discs, eccentrically embedded, have springs which force the valve to close in case no pressure is available. The pressure of the fluid passing through the system opens the valve discs, while any reversal of flow will close the valve discs. Closure is accomplished by the spring action and by back pressure.

Design Standard: API 594.

Retainer-less Construction ensures that they do not drill entirely into the valve body to allow the hinge-pin and the stop-pin to be fitted with a dual-plate check valve, The feature ensures high integrity & tamper-proof design, ensures no leakage from the body.

Wafer-type design, to take lesser space than the Reflux / Swing Check Valve.

Being light in weight has more rugged construction than the standard Swing Type Check Valve, which needs expensive foundation and special support.

Less wear and tear of seat surface due to resilient integrally ‘molded body seating face.

Stopper pin prevents the discs from coming into contact with each other and thus prevents disc damage. The stopper pin also prevents spring failure by ensuring that the discs don't travel beyond the full-open position.

Low cracking pressure design (operable at low pressures).

Independent spring design feature also available which gives less scrubbing of disc & independents movement of discs.

Inherently non-slamming, no external devices/attachment required.

Water hammering effect is minimized in this design, since the closing of valve does not depend upon any back pressure or flow.

Either vertically (only upwards) or horizontally installed.

Flanged ends as per IS:1538 PN-1.6 (FF).

Lifting eyebolt option is provided.

END CONNECTION

Wafer type Suitable for clamping between flanges as per ANSI B16.1 Class-125 / ASME B16.5 Class-150 / 1S 6392.

Suitability for insertion between other flange standards also available upon request.

Product Description : Wafer Type, Spring Loaded, Trim : Spring-SS316, Disc -Ductile Iron , Type of seat : Resilient Seated (BUNA N /EPDM)  

INTRODUCTION

• Leader Ductile Dual Plate Check Valves are automatic, quick-acting valve designed to prevent the reversal of flow in a piping system. The two valve discs, eccentrically embedded, have springs which force the valve to close in case no pressure is available. The pressure of the fluid passing through the system opens the valve discs, while any reversal of flow will close the valve discs. Closure is accomplished by the spring action and by back pressure.
• Design Standard: API 594.

• Body & Disc castings made of superior Ductile Iron ASTM A395 grade to ensure additional strength.
• Wafer type design, to take lesser space than the Reflux / Swing Check Valve.
• Being light in weight has more rugged construction than the standard Swing Type Check Valve, which needs expensive foundation and special supports.
• Less wear and tear of seat surface due to resilient integrally moulded body seating face.
• Stopper pin prevents the discs from coming into contact with each other and thus prevents disc damage. The stopper pin also prevents spring failure by ensuring that the discs don’t travel beyond the full-open position.
• Low cracking pressure design (operable at low pressures).
• Independent spring design feature also available which gives less scrubbing of disc & independents movement of discs.
• Inherently non-slamming, no external devices/attachment required.
• Water hammering effect is minimized in this design since the closing of valve does not depend upon any back pressure or flow.
• Either vertically (only upwards) or horizontally installed.
• Lifting eyebolt option is provided.